<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<input type="text" id="numInput"/>
		<button onclick="foo()">执行</button>
		
		<script>
			
			function foo()
			{	
				var num = numInput.value;				
				for(var i=0;i<num;i++)
				{
					console.log(i);
				}
			}
			
			
			
		</script>
	</body>
</html>
